Microchannel heat exchanger



FIG. 1 is a perspective view of my new design;

FIG. 2 is a top plan view of my new design;

FIG. 3 is a bottom plan view of my new design;

FIG. 4 is a right elevation view of my new design;

FIG. 5 is a left elevation view of my new design;

FIG. 6 is a front elevation view of my new design; and,

FIG. 7 is a rear elevation view of my new design. 

CLAIM The ornamental design for a microchannel heat exchanger, as shown and described. 